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Folks, if you have wanted to convert your AR-15 pistol to shoot 5.7X28. but do not feel like paying the hefty price tag for a new rifle or pistol, then look no further than this fantastic Banshee 300 Mk57 Conversion Kit from CMMG! The fine folks at CMMG are known for their innovation, quality control, and phenomenal firearms. This model is no exception. This model simply drops onto any standard AR-15 pistol lower receiver, push pin, and you are ready to rock!
This complete upper receiver kit features a 5" medium taper 416 stainless steel barrel with a 1:9 twist rate. Also featured on this model is the CMMG RML4 M-Lok handguard, which is ready to accept any accessories of your choosing. This model also features a flat top rail that is optics ready. This entire package is Mil-Spec Type III hard coat anodized and is incredibly rugged. This upper receiver kit also includes an ambidextrous charging handle and CMMG bolt carrier group. If the value could not get any better, CMMG has included (3) additional 40rd magazines, which will keep you shooting all day long!